<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- React核心包 最先引入 提供一个对象React -->
    <script src="../react18/react.development.js"></script>
    <!-- React操作DOM的包 提供了一个对象 ReactDOM -->
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
    <style>
        .box {
            width: 400px;
            height: 400px;
            background-color: aquamarine;
            margin: 0 auto;
        }
    </style>
</head>

<body>
    <!-- React操作的容器 -->
    <div id="app"></div>

    <script type="text/babel">
        //使用jsx方式创建虚拟DOM 
        // const vDom = <div> hello JSx </div>

       //使用jsx方式创建虚拟DOM 
       const vDom = (
        <div className="box">
            <h1>123</h1>
            <p>456</p>
        </div>
       );
        //把虚拟DOM交给React 渲染到容器中
        const root = ReactDOM.createRoot(document.getElementById('app'));
        root.render(vDom)
    </script>
</body>

</html>